# validation.jl
# Validation tools for NSEMSolver

"""
    validate_solution(result::NSResult) -> Dict

Validate the computed Navier-Stokes solution for physical consistency.
"""
function validate_solution(result::NSResult)
    validation = Dict{String, Any}()
    
    # Check solution boundedness
    u_max = maximum(abs, result.u)
    v_max = maximum(abs, result.v) 
    p_max = maximum(abs, result.p)
    
    validation["u_bounded"] = isfinite(u_max) && u_max < 1e10
    validation["v_bounded"] = isfinite(v_max) && v_max < 1e10
    validation["p_bounded"] = isfinite(p_max) && p_max < 1e10
    validation["solution_bounded"] = validation["u_bounded"] && validation["v_bounded"] && validation["p_bounded"]
    
    # Check for NaN values
    validation["u_has_nan"] = any(isnan, result.u)
    validation["v_has_nan"] = any(isnan, result.v)
    validation["p_has_nan"] = any(isnan, result.p)
    validation["solution_valid"] = !(validation["u_has_nan"] || validation["v_has_nan"] || validation["p_has_nan"])
    
    # Simple mass conservation check (placeholder)
    validation["mass_conserved"] = true  # Placeholder
    
    # Overall validation
    validation["overall_valid"] = validation["solution_bounded"] && validation["solution_valid"] && validation["mass_conserved"]
    
    return validation
end